In section B of Lesson 2, 'money' is used in the blank 'He has _____ money,' which is filled by 'a lot of,' a measure word typically used with uncountable nouns. Also, in section C, 'Do you have any money on you?' is listed under questions whose nouns are asked to be identified as countable or uncountable, implying it might be uncountable.
Class 6 › English Grammar and Composition › Chapter 1: Parts of Speech › Topic: Countable and Uncountable Nouns (Measure words)
Aligned to the NCTB national curriculum.