Syllabus

Mr Smith has a limited income which restricts the number of different goods he can buy. Which of the
following describes the position at which Mr Smith’s utility from purchasing different goods is
maximised?
? Marginal utility from each good is equal
? Marginal utility from each good is 0
? Ratio of marginal utility to price is equal for each good
Hello Sir
I faced the above question in my exam kit.
is this relevant with acca FBT syllabus or Is this topic are in syllabus because no where i got explanation of the question topics not in book not in opentuation notes