How many $\sigma$ and $\pi$ bonds are present in $CH_3COOH$?

Given below are two statements: One is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: Zero orbital overlap is an out-of-phase overlap.
Reason $R$: It results due to different orientation/direction of approach of orbitals.
In the light of the above statements,choose the correct answer from the options given below.

The $p-p$ orbital overlapping is present in the following molecule:

The $F_2$ molecule is formed by which of the following?

$A$ molecule $(X)$ has $(i)$ four sigma bonds formed by the overlap of $sp^2$ and $s$ orbitals,(ii) one sigma bond formed by $sp^2$ and $sp^2$ orbitals,and (iii) one $\pi$ bond formed by $p_z$ and $p_z$ orbitals. Which of the following is $X$?

Which orbitals on overlapping will form $\sigma$ and $\pi$ bond in $C=C$ of alkene? Explain.