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Ace Test Series: Compiler Design - Intermediate Code

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The answer given was D but isn't array access not a TAC as the following link suggests:

https://web.stanford.edu/class/archive/cs/cs143/cs143.1128/handouts/240%20TAC%20Examples.pdf

Can someone please clarify?

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A[i]=x;

x=A[i] both are valid TAC. Its one of the 7 standard three address code representations given in Aho,Ulman
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