Question

b) Consider the following two statements
1) A family of all surfaces always represents the first order linear
partial differential equation
II) A family of all surfaces with s-axis is the axis of revolution
always represents the first order linear partial differential
Then
i only (D) is true
2 only (11) is true
i) both (I) and (II) are true in both (I) and (II) are false
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Answer 1

option c is the answer for this question