Given below are two statements: 

Assertion (A): Receptors are crucial to the body's communication process.
Reason (R): Receptors are proteins.

1. Assertion and reason both are correct statements but reason does not explain assertion.
2. Assertion and reason both are correct and reason explains the assertion.
3. Both assertion and reason are wrong statements.
4. Assertion is the correct statement reason is the wrong statement.

Hint: Receptors are proteins.
Receptors are those proteins that help in the process of communication but they cannot solely exert the communication process. Neurotransmitters are required to send the signal to the cells which is a crucial part of the communication process.
Neurotransmitters are small molecules that bind to the receptor for a very short time to transfer a message to it and depart quickly unchanged after transferring the message. The receptor then forwards the message inside the cell.
Hence, Assertion and reason both are correct statements but reason does not explain assertion.