Match the following and choose the correct option.

	Column I		Column II
(a)	Poisonous sting	(i)	Bufo
(b)	Electric organ	(ii)	Pterophyllum
(c)	Air bladder	(iii)	Trygon
(d)	Tympanum	(iv)	Torpedo

• A

  a-iv; b-iii; c-ii; d-i

• B

  a-iii; b-iv; c-i; d-ii

• C

  a-iii; b-ii; c-iv; d-i

• D

  a-iii; b-iv; c-ii; d-i