Ans is D.
A language is called inherently ambiguous languages if we are not able to find a unambiguous grammar for the language.
But in this case we have the unambiguous grammar for both L1 and L2 languages. so the correct ans is D
L1={anbncm}∪{anbmcm},n,m≥0
unambiguous grammar for L1=
S → X | Y
X → UV
U → aUb | ∊
V → cV | ∊
Y → WX
W → aW | ∊
X → bXc | ∊
L2={wwR∣w∈{a,b}∗}
unambiguous grammar for L2 =
S → aSa | bSb | ∊