A) Water vapour
B) Carbon monoxide
C) Methane
D) Oxygen
Correct Answer: D
Solution :
Oxygen is not a green-house gas. The main gases responsible for green-house effect are \[C{{O}_{2}},C{{H}_{4}},CFCs\] and \[{{N}_{2}}O.\] Thus, for in the given case the probability of their daughters becoming colourblind will be 0%.
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