Answer & Explanation
B) If the data in statement II alone are sufficient answer the question
Statement I is merely an interpretation of the information contained in the question
However, Vipin's salary can be determined from statement II as follows
Let Vipin's and Javed's salaries be 4x and ax respectively.
Then, 3x = 4500 or x = 1500 Vipin's salary = 4x = Rs 6000.
Thus, II alone is sufficient.