Mark the statements as true/false by choosing the correct option from the set $(I-IV)$ given below:
$I.$ Magnesium is a constituent of chlorophyll and helps to maintain the ribosome structure.
$II.$ Calcium is needed during the formation of mitotic spindle.
$III.$ Magnesium is essential for the photolysis of water.
$IV.$ Zinc helps in sugar translocation.

• A
  $I-$True,$II-$True,$III-$False,$IV-$False
• B
  $I-$False,$II-$True,$III-$False,$IV-$True
• C
  $I-$True,$II-$False,$III-$True,$IV-$False
• D
  $I-$False,$II-$False,$III-$True,$IV-$True