To answer this question, we need to understand the given options and analyze them in the context of the question. Let's break down the question and each option for a better understanding.

Question: Which option is the correct answer?

Options:
a) 1
b) 2
c) 1 and 2
d) None of the above

Understanding the question:
The question asks us to determine the correct answer among the given options. We need to carefully analyze each option and choose the one that aligns with the question.

Analyzing the options:
a) Option 1: This option suggests that the correct answer is only 1.
b) Option 2: This option suggests that the correct answer is only 2.
c) Option 1 and 2: This option suggests that both 1 and 2 are correct.
d) None of the above: This option suggests that neither 1 nor 2 is correct.

Choosing the correct answer:
According to the question, we need to select the option that represents the correct answer. Let's evaluate each option:

a) Option 1 only: This option states that 1 is the correct answer. However, since option 2 is also given, it contradicts this choice.
b) Option 2 only: This option states that 2 is the correct answer. Similar to option 1, it contradicts the presence of option 1.
c) Option 1 and 2: This option suggests that both 1 and 2 are correct. Since options a) and b) contradict each other, this option seems to be the most reasonable choice.
d) None of the above: This option states that neither 1 nor 2 is correct. However, since option c) suggests that both 1 and 2 are correct, it contradicts this choice.

Therefore, the correct answer is option 'C' - 1 and 2.

In conclusion, after carefully analyzing each option and considering the given question, it is evident that option 'C' is the correct answer as it suggests that both 1 and 2 are correct.