In each of the questions given below, four words are given in bold. These four words may or may not be in their correct position. The sentence is then followed by options with the correct combination of words that should replace each other in order to make the sentence grammatically and contextually correct. Find the correct combination of words that replace each other.

Despite the indomitable (A) challenges faced by the intrepid explorer during his arduous (B) journey through the unforgiving (C) wilderness, his relentless (D) spirit propelled him forward.

A complete flower will always be

Fruit cracking is a serious problem of young fruits of pomegranate. It occurs due to deficiency of_______________

A well-known practice to ensure adequate nitrogen of legumes in lieu of N-fertilizer is

The point at which CO2 uptake exactly balances CO2 release is called

Maximum eluviation of clay, Fe and Al oxides occurs in which horizon

A 1.5 ha wheat crop filed was supplied with 6 cm depth of irrigation, compute how many liters of water has gone into the filed.

DNA exists as a double helix as a result of hydrogen bonding between: 

Converts message in the code into ordinary language which may be easily understood is:

Cooperative marketing in India has _______ tier structure.

In the context of agricultural trade, what does the acronym "WTO" stand for?