Who among the following coined the term zero hour?

Economic Planning comes under which of the following lists ?

Consider the following statements about Indian National Army:

1. The army was first formed in 1942 under Mohan Singh
2. It drew ex-prisoners and thousands of civilian volunteers from the Indian expatriate population in Malaya and Burma

Which of the above statements is/are correct?

Consider the following:

1. Shift from coal-fired tandoors to LPG
2. Afforestation
3. Shift from diesel based vehicles to petrol vehicles

Which of the above will help to reduce PM2.5 from atmosphere?

Consider the following diferences between RBCs and WBCs in human body:

1. RBCs are smaller in size but larger in number compared to WBCs
2. While RBCs do not have nucleus, WBCs have nucleus

Which of the above statements is/are correct?