Directions :- In the following questions a statement of assertion is followed by a statement of reason. Mark the correct choice as:-
A) Both assertion and reason are true and reason is the correct explanation of the assertion.
B) Both assertion and reason are true but reason is not the correct explanation of assertion.
C) Assertion is true but reason is false.
D) Assertion is false but reason is true.
Assertion :-Proto oncogenes are cellular genes required for normal growth .
Reasoning :- Under normal conditions proto oncogenes could lead to the oncogenic transformation of the cell.

B

Several genes called cellular oncogenes (c-onc) or proto oncogenes have been identified in normal cells which, when activated under certain conditions, could lead to oncogenic transformation of the cells.