RRB Group D 15-Sep-2018 Shift 1 Solved Paper

© examsiri.com

Question : 65 of 100

Marks: +1, -0

Tooth decay starts when the pH of the mouthis :

is in the range of 8 - 9
is in the range of 6.5 - 7.5
in the range 5.5 - 6.5
less than 5.5

Go to Question:

Prev Question

Next Question