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Select the correct statements for ideal gases:
`1. ((delH)/(delT))_(P)-((delU)/(delT))_(V)=R`
`2. ((delH)/(delT))_(P)-((delU)/(delT))_(P)-((delU)/(delT))_(V)`=work done
`3. ((delU)/(delV))_(T)=+ve`
`4. ((delT)/(delP))_(H)=+ve`

A

`1,2,3,4`

B

`1,2,4`

C

`1,2,3`

D

`1`

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The correct Answer is:
A
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