Assertion (A): Black hole is such a celestial existence which cannot be seen by telescope.
Reason (R): The gravitational field of black hole is much strong that even light does not escape from it.

A. Both (A) and (R) are true and (R) is the correct explanation of (A)

B. Both (A) and (R) are true, but (R) is not the correct explanation of (A)

C. (A) is true, but (R) is false

D. (A) is false, but (R) is true

Answer: Option A