The materials that are required to prepare food are 

B) Both a, b correct

C) bottle, paper, pen cap

B) To prevent the spoilage by oxidation

option C is correct Photosynthesis

Roots which store food materials are called Taproot roots.

The stems that stores the food materials are known as Tuberous Stems.

B) spring balance, brick, thread

(iii) Both assertion and reason are wrong statement.

Susceptibility of material is negative, so given material is diamagnetic.