user31688: Is it possible to create a multisig address such that it has 3 public keys attached, needs 2 signatures to create a transaction, but one of the signatures must be from a specific public key of the 3? If so, how?

user12983: redeem:
<pubkey3> OP_CHECKSIGVERIFY OP_1 <pubkey1> <pubkey2> OP_2 OP_CHECKMULTISIG

scriptSig:
OP_FALSE <sig1> <sig3> <redeem>

or 
OP_FALSE <sig2> <sig3> <redeem>


31688: <p>Is it possible to create a multisig address such that it has 3 public keys attached, needs 2 signatures to create a transaction, <em>but</em> one of the signatures must be from a specific public key of the 3? If so, how?</p>
 12983: <p>redeem:</p>

<pre><code>&lt;pubkey3&gt; OP_CHECKSIGVERIFY OP_1 &lt;pubkey1&gt; &lt;pubkey2&gt; OP_2 OP_CHECKMULTISIG
</code></pre>

<p>scriptSig:</p>

<pre><code>OP_FALSE &lt;sig1&gt; &lt;sig3&gt; &lt;redeem&gt;
</code></pre>

<p>or </p>

<pre><code>OP_FALSE &lt;sig2&gt; &lt;sig3&gt; &lt;redeem&gt;
</code></pre>
