Industrious = mehnati ( Industry mei aage badne ke liye mehnat krni pdti hai )

In = Negative => Indolent = sust/alsi/Akshay

Casual = common or normally (specially without any restriction )

formal = official

If a company have dress code , You will have to wear formal clothes

If a company doesn't have dress code , you can wear formal or casual(Jeans) clothes

Explanation:

Industrious means hardworking, diligent, or industrious. It refers to someone who is actively engaged in work or activities and puts in a lot of effort and dedication. In the given options, we need to choose the word that is most opposite in meaning to industrious.

Indifferent:
Indifferent means lacking interest, concern, or enthusiasm. It refers to someone who is apathetic or unconcerned about something. This word does not represent the opposite of industrious because an indifferent person may still be hardworking and diligent in their work.

Indolent:
Indolent means lazy or idle. It refers to someone who avoids work or effort and prefers to be inactive or lazy. This word represents the opposite of industrious as it describes someone who lacks the drive or motivation to work hard.

Casual:
Casual means relaxed, informal, or nonchalant. It refers to something done without much thought or effort. While it does represent a more laid-back attitude, it is not necessarily the opposite of industrious. A casual person can still be hardworking and dedicated.

Passive:
Passive means inactive or inert, lacking in energy or initiative. It refers to someone who tends to go along with things without taking action or showing much enthusiasm. While it may represent a lack of drive or initiative, it is not the direct opposite of industrious. A passive person can still be hardworking in certain situations.

Therefore, the correct answer is option B) Indolent, as it represents the opposite meaning of industrious by describing someone who is lazy or idle.