Read the statement about characteristic features of class- Monoplacophora.
I. Body is flat , bilaterally symmetrical and oval -shaped .
II . The animals bear nephridia and internal segmentation like annelids .
III . This is the only class among molluscs which includes monoecious species .
IV. The body is enclosed in a mantle which secrets a dome-shaped outer shell .
Choose the option with correct codes
A. I, II and IV
B. I and II
C. II and IV
D. I and III