Question: Normally we say "Assalam o Alaikum", but my sir said that for women we need to say "Assalam o Alaikuna". Is that right?

Answer: 
If you want to get it really right, then you need to say:

* To one woman: as-salāmu ʻalayki (or ʻalayk)
* To two women: as-salāmu ʻalaykumā
* To three or more women: as-salāmu ʻalaykunna (or ʻalaykunn)
* To a mixed group (men and women): as-salāmu ʻalaykum
In regards to greeting in Arabic (for females):

According to Arabic grammar, KOM is used for men, and Kon (Konna) is used for women. As a result if you’d like to use the correct grammatical shape of it, you ought to say “Assalam o Alaikon (Konna) which is written like the following phrase:

> 
> السلام علیکن
> 
> 
> 

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Of course, there is another nice point, and it is related to singular and plural nouns. Actually “Kon” is related to plural noun (according to the correct Arabic grammar).

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But is the singular noun it is writes:

> 
> السلام علیک / Assalam o Alaike (For female)
> 
> 
>