Assertion. A router and a bridge are similar.

Reason. A router works like a bridge but can handle different protocols unlike bridge.

(d)

Assertion is false but Reason is true.

Explanation
A router is a network device that forwards data from one network to another using logical addresses. A router works like a bridge but can handle different protocols. On the other hand, a bridge is a device that links two networks together using physical addresses and can handle networks that follow the same protocols. Hence, a router and a bridge are different.