Assertion: Unit of nervous tissue is neuron.<br> Reason: The nerve tissue is developed from ectoderm.

Question

$\begin{array}{1 1}(A)\;\text{If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.}\\(B)\;\text{If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.}\\(C)\;\text{If Assertion is true, but Reason is false.}\\(D)\;\text{If both Assertion and Reason are false.}\end{array}$