Consider the following statements
(A) Plant cells have centrioles which are absent in almost all animal cells
(B) Ribosomes are the site of protein synthesis
(C ) The middle lamella is a layer mainly of calcium carbonate which holds the different neighbouring cells together
(D) In animal cell steroidal hormones are synthesized by smooth endoplasmicreticulum
Of the above statements
A. a and b only are correct
B. c and d only are correct
C. a and d only are correct
D. b and c are correct
