Which days are called Ayam-e-Tashreeq?

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Which days are called Ayam-e-Tashreeq?

A. 11, 12 and 13 Zil Haj
B. 9, 10 and 11 Muharram
C. 27, 28 and 29 Ramadan
D. 15, 16 and 17 Sha’ban