- Where one of several beneficiaries

(a) joins in committing breach of trust, or

(b) knowingly obtains any advantage therefrom, without the consent of the other beneficiaries, or

(c) becomes aware of a breach of trust committed or intended to be committed, and either actually conceals it, or does not within a reasonable time take proper steps to protect the interests of the other beneficiaries, or

(d) has deceived the trustee and thereby induced him to commit a breach of trust,