Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Eastern depressions are responsible for heavy rainfall during June to September in India.
Reason (R) : Eastern depressions are mostly origited over Bay of Bengal and travel in north westerly direction across the country.
In the light of the above statements, choose the most appropriate answer from the options given below :