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                              Q:
                           
                           
                                                      | A) only A alone is sufficient | B) only B alone is sufficient | 
| C) both A and B are required | D) Cannot be answered | 
                              Answer:   B) only B alone is sufficient 
                              
                                                            
                              
Explanation:
                               
                           
                           Explanation:
For the given problem there are three possiblities.
Father's age can be = 36, 31, 29
Mother's age = 32, 27, 25
Son's age = 8, 3, 1.
By using only B it can be calculated.
 
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