If India is chosen, japan cannot be the second country chosen from Asia.
1. One of the possible combinations will be :
India, Sri Lanka, UK, USA
2. The other combination will be:
(i) India, China, UK, France
(ii) India, China, UK, Germany
(iii) India, China, USA, France
(iv) India, China, USA, Germany
In all, there are five different ways in which the four countries can be chosen.
If China and Sri Lanka are the two countries chosen from Asia, then only one from UK or USA can be selected (condition 3). Also, if Sri Lanka is chosen, Neither France nor Germany can be selected.
Therefore, it is not possible to select China and Sri Lanka as the two countries from Asia.
India has to be definitely selected, therefore Japan cannot be selected.
If Rawat is selected, Shalini cannot be selected , and therefore Kapil also cannot be selected. Further, Vatsala is definitely selected. Exactly one from Prateek or Tarun has to be selected. This can happen in two ways. Now, the fourth member can be any one from Abhishek and Vinod, which can happen in two ways.
Therefore, total number of ways = 2 x 2 = 4 ways.
If Shalini is selected, Rawat is definitely not selected. Also, exactly one from Prateek or Tarun is selected, that is, the team can have a maximum of six members.
If Rawat is selected, Shalini cannot be selected. Also, Shalini and Kapil will be selected together. Therefore, if Shalini is not selected, Kapil will also not be selected.
It is mentioned that exactly one from Prateek or Tarun will be selected. Taking all the conditions into consideration, Rawat cannot be a member of a team having six members.
Kapil and Rawat cannot be members of the same team since Kapil and Shalini are to be always selected together, while Rawat and Shalini can never be selected in the same team.
The team given in option (b) is not possible since Shalini and Kapil have to be selected together.
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