Read the following question and decide which of the given statements is/are sufficient.
If X is a natural number, is X+6 odd ?
Statements:
1. X-15 is a whole number.
2. X-6 is an odd number.

A

2 alone is sufficient while 1 alone is not sufficient to answer the question.

B

Both 1 and 2 together are sufficient to answer the question.

C

Either 1 or 2 is sufficient to answer the question.

D

1 alone is sufficient while 2 alone is not sufficient to answer the question.