Is GRE necessary to study in <span class="mention" data-index="0" data-denotation-char="@" data-id="0" data-value="Canada"><span contenteditable="false"><span class="ql-mention-denotation-char">@</span>Canada</span></span> universities? Want to study business related programs in <span class="mention" data-index="3" data-denotation-char="@" data-id="32" data-value=" University of Ottawa "><span contenteditable="false"><span class="ql-mention-denotation-char">@</span> University of Ottawa </span></span>. Please help me with this.