What is the optimum relative humidity range for crop

Select the letter cluster that will come next in the following series.

CHD, EJF, ______

Pointing to a child in the photograph, a gentleman said “His father’s father is my brother.” How is this gentleman related to the child?

Select the figure from the options that can replace the question mark (?) and complete the given figure

Statements: Some chargers are metal. All metal are hard. Some hard are stools.

Conclusion I: All chargers are metal.

Conclusion II: Some stools are hard.

It '+' means ×, '–' means ÷, '×' means + and '÷' means –, compute the value of the expression:

15 + 9 × 10 ÷ 5

Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.

CB_W V_SP _NLI HG_B A_XU

Select the figure that will come next in the following series. 

If SEARCH is written as ARECSH, then how will NAGPUR be written in the same code?

‘F + R’ means ‘F is the mother of R’

‘F – R’ means ‘F is the father of R’