Which of the following statemetn are correct and incorret 1. Synaptic cleft of neurons secrate adrenaline 2. Myelinated nerve fibres are enveloped with Schwann cells, which form a myelin sheath around the axon 3. Non- myrlineated nerve fibre is emclosed by a schwann cell that from a myelin sheath. 4. Spinal cord and cranial nerve are made of non-myelinated nerve fibres of the four statemetsA. 1,2 are correct but 3 and 4 are incorrectB. 1,2 and 3 are correct but 4 is incorrectC. 3 and 4 are correct but 1 and 2 are incorrectD. 1 and 4 correct while 2 and 3 are incorrect

Which of the following statemetn are correct and incorret 1. Synaptic

1.	Which of the following statemetn are correct and incorret 1. Synaptic cleft of neurons secrate adrenaline 2. Myelinated nerve fibres are enveloped with Schwann cells, which form a myelin sheath around the axon 3. Non- myrlineated nerve fibre is emclosed by a schwann cell that from a myelin sheath. 4. Spinal cord and cranial nerve are made of non-myelinated nerve fibres of the four statemetsA. 1,2 are correct but 3 and 4 are incorrectB. 1,2 and 3 are correct but 4 is incorrectC. 3 and 4 are correct but 1 and 2 are incorrectD. 1 and 4 correct while 2 and 3 are incorrect
Answer» Correct Answer - d