Subject Wise Question -> ENGLISH GRAMMAR -> JUMBLED WORDS

Some parts of the question have marked (P), (Q), (R) & (S) and have been put in jumbled order. Select the appropriate option from the given choices to rearrange the parts and make meaningful sentence. 
For dropping kilos it is safe to cut your fat intake (P) / and maintaining weight loss (Q) / to 20% of your calories (R) / even further (S)