i heard he mention atkin diet. is this diet safe? i think this diet will cause some muscle lose. 

how about milk. does milk consider sugar drink?

you know after workout and you take one cup of choc milk. man it taste like heaven.

so is it gud to take it or i should avoid it when cutting?

Define "sugar drink" . Milk itself is sugar btw . Rice is sugar , etc...

Why can't take milk when cutting? Stop misleading people!
Cutting is based on how much calorie intake not what food you take.

Let say someone TDEE is 2500kcal.
If he take ONLY chicken breast, broccoli and brown rice, total = 3000kcal, he still gain weight.
If he take ONLY milk, total = 2000kcal, he still lose weight.

The problem is taking same food will cause imbalance in macronutrient and micro. That's why ppl suggesting taking different variety of protein, carb and fat source.

LOL... Go ahead with your macro ratio cutting. 40% protein so 2000kcal cutting phase need 200g protein. I'm cutting with just 150g protein and everything going well. Did I cut unhealthy?

And you said he should avoid milk, but can't he just drink 250ml? That's just around 150kcal. With that 150kcal you got nice portion of carb, protein and fat. You ate a cup rice which is around 250kcal. That's all carb and little protein, so is rice not a good meal in cutting too?

We can use any food we want to meet our daily calorie requirement. That's nothing such healthy/unhealthy food. Everything depends on your portion. Some people in this forum even cutting with chicken skin LOL.

this guy gets it.
you dont form your diet around specific food.
you form it around your own tdee.
depends  whether you want weight gain (tdee+200-500Cal) or weight loss (tdee-200-500Cal)

besides, a 3000Cal of fat is the same as 3000Cal of carb.
in the end youll still consume 3000Cal.
the only difference is most likely the fatty food is of lower portion than the carby food. and also satiety factor, gi index, etc. but thats only relevant if you want to have specific goal like slow/fast energy realease/carb loading or increase satiety diet/etc.
for weight loss, calorie in<calorie out is enough.