Answer:
diagraphs
Step-by-step explanation:
Voiceless combinations of two consonants is called B. Diagraphs.
Consonant digraphs include - bl, br, ch, ck, cl, cr, dr, fl, fr, gh, gl, gr, ng, ph, pl, pr, qu, sc, sh, sk, sl, sm, sn, sp, st, sw, th, tr, tw, wh, wr.
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