Which Article of Indian Constitution incorporates doctrine of pleasure?

Which of the following commodities are directly affected by the fluctuations in international rates of the crude oil?

Reduced tillage practices are helpful for soil health in many ways. Consider the following statements with this context:

1. Reduced tillage helps to improve the soil food web and biodiversity
2. Reduced tillage brings down the requirement of herbicides
3. Reduced tillage helps in mitigation of GHG emissions

Which among the above is / are correct statements?

Each term of which of the following sets denotes a kind of tax / cess during Gupta Era?

Goods and Service Tax:
1. will be shared between Centre and States
2. will be levied by Centre as well as States
3. proposes exports to be zero rated
4. proposed imports to be zero rated
Which among the above is / are correct?