Grammar Rules for the English Language section in the IBPS Clerk Exam:
1. Subject-Verb Agreement: Ensure that the subject and verb in a sentence agree in terms of number and person. For example, "He plays the piano" is correct, whereas "He play the piano" is incorrect.
2. Tenses: Understand the different tenses and their usage. Pay attention to verb forms and time expressions to determine the appropriate tense to use in a sentence.
3. Articles: Master the use of articles (a, an, the) in English. Learn when to use definite and indefinite articles and when to omit them.
4. Prepositions: Familiarize yourself with common prepositions and their usage. Pay attention to prepositions of time, place, and direction.
5. Pronouns: Understand the different types of pronouns and their usage. Avoid pronoun errors such as incorrect subject-object agreement or ambiguous references.
6. Sentence Structure: Learn about different sentence structures, including simple, compound, and complex sentences. Pay attention to punctuation and sentence connectors.
7. Parallelism: Ensure that parallel elements in a sentence are grammatically and structurally consistent. For example, "She likes reading, swimming, and hiking" is correct, whereas "She likes reading, to swim, and hiking" is incorrect.

Vocabulary Topics for the English Language section in the IBPS Clerk Exam:
1. Synonyms and Antonyms: Develop a strong vocabulary by learning synonyms (words with similar meanings) and antonyms (words with opposite meanings).
2. Idioms and Phrases: Familiarize yourself with common idiomatic expressions and phrases used in English. Learn their meanings and usage in context.
3. One-word Substitution: Practice identifying words that can substitute a phrase or a group of words. For example, "acrophobia" is a one-word substitution for the fear of heights.
4. Homonyms and Homophones: Understand the differences between words that sound alike but have different meanings (homonyms) and words that sound alike and may or may not be spelled alike (homophones).
5. Prefixes and Suffixes: Learn common prefixes and suffixes to understand the meaning of unfamiliar words. For example, "un-" is a prefix that indicates negation, as in the word "unhappy."
6. Collocations: Study common word combinations and collocations to improve your vocabulary. For example, "make a decision," "take a shower," or "run an errand."
7. Word Formation: Learn how words are formed using prefixes, suffixes, and root words. Understand the meaning and usage of different word forms, such as nouns, verbs, adjectives, and adverbs.

Conclusion:
To perform well in the English Language section of the IBPS Clerk Exam, it is essential to have a strong grasp of grammar rules and vocabulary topics. Focus on understanding subject-verb agreement, tenses, articles, prepositions, pronouns, sentence structure, and parallelism in grammar. In terms of vocabulary, practice synonyms, antonyms, idioms, one-word substitutions, homonyms, homophones, prefixes, suffixes, collocations, and word formation. Regular practice and expanding your language skills will help you excel in this section of the exam.