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Consider the following statements : A nu...

Consider the following statements : A number `a_1 a_2 a_3 a_4 a_5` is divisible by 9 if
1. `a_1 + a_2 + a_3 + a_4 + a_5` is divisible by 9.
2. `a_1 - a_2 + a_3 - a_4 + a_5` is divisible by 9.
Which of the above statements is/are correct?

A

1 only

B

2 only

C

Both 1 and 2

D

Neither 1 nor 2

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