Consider the following statements regarding a motor car battery.
1. The voltage is usually 12 V.
2. Electrolyte used is hydrochloric acid.
3. Electrodes are lead and copper.
4. Capacity is expressed in ampere hour.
Which of the above statement are correct?

A. 1 and 2

B. 2 and 3

C. 3 and 4

D. 1 and 4

Answer: Option D