单选题

以下Swift代码哪项会返回false?

Question

A. <pre class="prettyprint">func myFunc() -&gt Bool{ let a:String? = nil let b:String? = &quot123&quot return a ?? b != nil }</pre>

B. <pre class="prettyprint">func myFunc() -&gt Bool{ guard true else { return true } return false }</pre>

C. <pre class="prettyprint">func myFunc() -&gt Bool{ var a = [1,2,3] var b = [1,2,3] return a == b }</pre>

D. <pre class="prettyprint">func myFunc() -&gt Bool{ var b:Bool? = true if let b2 = b{ return b2 }else{ return false } }</pre>