Scetion 184 (2) of the companies act 2013

Yes, As per section 2 (76) of the CA, 2013, they are related parties.

Hi Thank you.

Suppose Mr. X holds 1%, Mr. Y holds 0.5% and Mr. Z holds 3% in ABC Ltd, then Mr. X and Mr. Y leaving aside Mr. Z, can participate in the Board Meeting of XYZ Ltd. in which the arrangement is to be discussed right?

None o them can participate  in such meeting since all directors(XYZ) holding put together exceeding 2%.

Aren't these Private Limited Companies?

As per Section 184(3) if the director participates in meeting after disclosure of interest, the arrangement can be VOIDABLE ONLY AT THE OPTION OF THE COMPANY. I guess you can take advantage of this sub-section OR you can appoint Additional directors to discuss the agenda.

These are holding and wholly owned subsidiary, is there any exemption in this case?